Note 11 - Disclosures about Fair Value of Assets and Liabilities (Details) - Fair Value of Assets Measured on Recurring Basis - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Note 11 - Disclosures about Fair Value of Assets and Liabilities (Details) - Fair Value of Assets Measured on Recurring Basis [Line Items]
Available-for-sale securities	$ 97,292,487	$ 86,467,985
Equity Securities [Member]
Note 11 - Disclosures about Fair Value of Assets and Liabilities (Details) - Fair Value of Assets Measured on Recurring Basis [Line Items]
Available-for-sale securities	99,517	105,023
US Government Agencies Debt Securities [Member]
Note 11 - Disclosures about Fair Value of Assets and Liabilities (Details) - Fair Value of Assets Measured on Recurring Basis [Line Items]
Available-for-sale securities	8,396,784	10,256,773
US States and Political Subdivisions Debt Securities [Member]
Note 11 - Disclosures about Fair Value of Assets and Liabilities (Details) - Fair Value of Assets Measured on Recurring Basis [Line Items]
Available-for-sale securities	31,349,162	15,589,890
Domestic Corporate Debt Securities [Member]
Note 11 - Disclosures about Fair Value of Assets and Liabilities (Details) - Fair Value of Assets Measured on Recurring Basis [Line Items]
Available-for-sale securities	3,814,000
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Note 11 - Disclosures about Fair Value of Assets and Liabilities (Details) - Fair Value of Assets Measured on Recurring Basis [Line Items]
Available-for-sale securities	53,633,324	60,516,299
Fair Value, Inputs, Level 1 [Member]
Note 11 - Disclosures about Fair Value of Assets and Liabilities (Details) - Fair Value of Assets Measured on Recurring Basis [Line Items]
Available-for-sale securities	99,000	105,000
Fair Value, Inputs, Level 1 [Member] | Equity Securities [Member]
Note 11 - Disclosures about Fair Value of Assets and Liabilities (Details) - Fair Value of Assets Measured on Recurring Basis [Line Items]
Available-for-sale securities	99,000	105,000
Fair Value, Inputs, Level 2 [Member]
Note 11 - Disclosures about Fair Value of Assets and Liabilities (Details) - Fair Value of Assets Measured on Recurring Basis [Line Items]
Available-for-sale securities	97,193,000	86,363,000
Fair Value, Inputs, Level 2 [Member] | US Government Agencies Debt Securities [Member]
Note 11 - Disclosures about Fair Value of Assets and Liabilities (Details) - Fair Value of Assets Measured on Recurring Basis [Line Items]
Available-for-sale securities	8,397,000	10,257,000
Fair Value, Inputs, Level 2 [Member] | US States and Political Subdivisions Debt Securities [Member]
Note 11 - Disclosures about Fair Value of Assets and Liabilities (Details) - Fair Value of Assets Measured on Recurring Basis [Line Items]
Available-for-sale securities	31,349,000	15,590,000
Fair Value, Inputs, Level 2 [Member] | Domestic Corporate Debt Securities [Member]
Note 11 - Disclosures about Fair Value of Assets and Liabilities (Details) - Fair Value of Assets Measured on Recurring Basis [Line Items]
Available-for-sale securities	3,814,000
Fair Value, Inputs, Level 2 [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Note 11 - Disclosures about Fair Value of Assets and Liabilities (Details) - Fair Value of Assets Measured on Recurring Basis [Line Items]
Available-for-sale securities	$ 53,633,000	$ 60,516,000